👉 A fistula is a medical condition in which blood vessels have become blocked or narrowed, preventing them from providing oxygen to tissues and organs. This can lead to the formation of a blood clot that can cause pain, bleeding, and organ damage. In the context of fistulas, the term "fistulae" refers to the structures that connect the veins (vessels) in the body to the arteries or blood vessels. These structures are usually made up of valves, which help control the
